In javax.websocket.WebSocketContainer, the javadoc for two connectToServer method signatures contains an incorrect statement:
connectToServer(Object annotatedEndpointInstance, URI path)
connectToServer(Class<?> annotatedEndpointClass, URI path)

The supplied object must be a class decorated with the class level {@link javax.websocket.server.ServerEndpoint} annotation.

which should point to javax.websocket.ClientEndpoint instead of the ServerEndpoint.

Also, in case of connectToServer(Object annotatedEndpointInstance, URI path), that sentence should read ...supplied object must be an instance of a class...